McConaughey's foreign tongue

The heartthrob actor and the Spanish beauty have been together for 18 months - and Mathew insists speaking in different tongues makes things more interesting.

He said: "It's not difficult to communicate when we speak a different language. If anything, it's been an asset.

"When I speak Spanish, I choose my words very carefully. Instead of saying 'I am from Chicago', I may say: 'My first days in this world were in the city with the wind'. All of a sudden you frame this little poetic thing."

However, the 36-year-old - who was voted sexiest man alive last year - says the pressure on a celebrity couple can be difficult to deal with.

But he denies relationships between two A-list stars are any different to regular partnerships.

He told Scotland's Daily Record newspaper: "Relationships are tough across the board. Look at the statistics. Over half the people get divorced and they're not all actors in the business.